Soudal B1 Genius Gun Fire & Acoustic Expanding Foam in a 600ml canister is a single-component, self-expanding polyurethane foam designed for precision sealing, filling, and insulating applications. The foam expands upon contact with moisture, forming a stable, thixotropic structure that provides both fire resistance and superior sound insulation. Formulated with HCFC- and CFC-free propellants, it offers environmental safety without compromising performance. Equipped with Soudal’s patented Genius Gun applicator, the foam allows controlled, one-handed operation, ensuring accurate delivery and minimal waste during application. Once cured, it achieves a free-foamed density of approximately 40 kg/m³ and provides sound insulation up to 58 dB, with excellent adhesion to most construction materials except polyethylene (PE), polypropylene (PP), and polytetrafluoroethylene (PTFE). The foam exhibits high stability, with less than 5% shrinkage and no post-expansion after curing, ensuring consistent fill and long-term performance. With a temperature resistance from -40°C to +90°C and a fire classification of B1 to DIN 4102, it is well suited for both fire-rated and acoustic applications. Thermally efficient with a conductivity value of 35.4 mW/m·K, the product enhances both thermal and acoustic comfort in building envelopes, structural joints, and service penetrations. Each 600ml aerosol yields approximately 25 litres of foam or up to 18 metres of sealed joint, depending on the application conditions.